The scream catches her attention, so she looks behind to check on them- and the ones whose heads have been caved in are all beginning to heave themselves back on their feet, with ugly pulsing new parts that hold them together. No eyes, but from the way they move she doesn't think they need them anymore. She looks back at the fire escape, tantalizingly close, and doubles back to tackle the zombie menacing Merrick.
"More running," she growls (it's not her fault, as the larger, heavier form she's slipped into can't really do anything but growl even if it's supposed to be nearly human), and then she half-screams, half-snarls when it takes advantage of her distraction to bite into her shoulder. It shouldn't be able to bite all the way through her clothes, but it does, and it hurts.
She tears off its head with a thick, ripping wet rag sound and when that doesn't persuade it to let go, she stands up and pries it off to throw at the new ones running towards them.